Elliniko is a coastal municipality in the Attica region and a southern suburban town in the Athens agglomeration in Greece. Since the 2011 local government reform, it has been part of the municipality of Elliniko-Argyroupoli, of which it is a municipal unit. Elliniko is known for the former Hellinikon Olympic Complex, a temporary sporting complex building on the grounds of the former Ellinikon International Airport used for the 2004 Summer Olympics and the 2004 Summer Paralympics.